As of July 2011, 40 percent of all mobile phones in use are smartphones. The number continues to grow every day, according to Nielsen research. Android is the king of the mobile operating system share with 40 percent of all smartphones, while Apple iOS is second with 28 percent.
It’s also clear that smartphone adoption isn’t going to stop there. Nielsen’s research indicates that the majority of mobile phone users are likely to upgrade to a smartphone and likely to choose an Android or Apple iOS device.